package com.lagou.edu.interceptor;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class LoginInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        HttpSession session = request.getSession();
        if (session.getAttribute("login") == null) {
            request.setAttribute("message", "请先登录");
            request.getRequestDispatcher("/index.jsp").forward(request, response);
            return false;
        }

        return true;
    }
}
